That's a Rodipet labyrinth house. They don't make that one any more - they have some newer similar ones. Rodipet are based in Germany - they have some great hamster stuff - and they ship to the Uk - but there is postage to pay as well - usually about £8. Which makes it more expensive. Happy Henry's homes sell similar ones.
This is the newer version for Syrians. I think the size and compartments are identical to mine, but they've changed the roof - instead of a one piece roof, it is smaller sections that can be lifted off individually. Including two granite pieces

They're good for a cool spot for a hamster to sit on and also good to help keep their nails trim when they walk on it. They're quite expensive though.
The Syrian one from Happy Henrys homes is slightly cheaper and assume postage would be less. In both cases though you need legs for the house

. Hamsters can tunnel under a large or heavier house and it can fall on them. Rodipet sell legs/stilts for their houses and I think Happy Henrys homes do as well. Or if you're diy minded you can just glue some dowels on for legs. I did that the first time so I had the legs exactly the height I wanted for a particular cage.
Basically with the legs/stilts, the house sits at about the height of the substrate, if you have 6" of substrate. If you want it to sit lower than that you can cut a bit off the legs (but that's a pain and hard work with a saw!) The thin dowel legs I made were easy to cut though
Slot Together Wooden Hamster Chamber House Made from robust materials Assembled without glue or nails Flat packed to save on packaging materials Modular, allowing you to change the design to suit your requirements Chambers can be changed into two main configurations Removeable roof for checking...
www.happyhenryshomes.co.uk
Further down this thread you can see my dowel legs and how they worked/were stuck on.
I love DIY, especially when its hamster related. I'm hooked on making bin cages and donate them to rescues. My favourite item in the kitchen is a Dremel tool. It does not belong into a shed but i do use it outside of course. I'm always on the lookout for big plastic boxed. My best haul was four...
www.thehamsterforum.com